JP2805156B2 - Method for producing knitted fabric and circular knitting machine used for the method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a lower surface of a sinker top of a stitch forming portion after a yarn is captured by a knitting needle in a process in which a knitting needle inserted into a cylinder rotates while moving up and down. The present invention relates to a method for producing a knitted fabric by drawing a thread into a knitted fabric to form a stitch.

Further, the present invention is a circular knitting machine for carrying out the method, comprising a plurality of knitting needles and sinkers, wherein a raising cam and a knitting needle for raising the knitting needle and transferring a loop to the needle stem are lowered. It has a stitch cam that pulls in the supplied yarn by the required stitch length on the lower surface of the sinker top,
Further, the present invention relates to a circular knitting machine in which up, down, front and rear movements are controlled by a sinker cam when a sinker arranged between knitting needles accommodated in a cylinder moves in an inclined direction.

[Prior Art] In a general single knit circular knitting machine, when a knitting fabric is manufactured, a new loop in a hook of the knitting needle forcibly opens a latch of the knitting needle while the knitting needle is rising. Slide down the tip of the latch and move to the needle stem.

More specifically, the sinker arranged at right angles to the knitting needle inserted into the cylinder moves horizontally in the radial direction of the knitting machine, and the sinker top, which is the reference for stitch formation, always keeps the same height. doing. The stroke of the knit cam required for forming the stitch is determined by the stitch point that determines the size of the stitch and the height of a clearing point (a position at which the loop comes off the latch) that causes the formed stitch to escape from the latch.

The stroke of the knit cam can be represented by the height from the sinker top to the clearing point in addition to the height from the sinker top to the stitch point.

For example, in a typical 14G single jersey machine, the stitch amount (height from the sinker top to the stitch point) is required to be 2.5 mm. The clearing height (height from the sinker top to the clearing point) is the same as the needle's latch length (la
Depending on the tch length, a minimum of 8.5 mm is required for a latch length of 6 mm and a stitch amount of 2.5 mm.

In this case, the stroke of the knit cam is 2.5mm + 8.5mm =
11.0 mm. In order to obtain the stroke of the knit cam, the inclination angle for raising and lowering the bat with the knit cam must be steep, for example, 55 to 56 degrees in a knitting machine having four yarn feeders per inch.

Also, recent high-production knitting machines have a large number of yarn feeders, which means that a raising cam for raising a knitting needle,
This means that the angle of the stitch cam for lowering the knitting needle to form the stitch becomes steep. A steep cam angle means that the opening and closing speed of the latch increases.

In order to improve these problems, in the knitting needle, efforts have been made to reduce the inertia force when the latch is opened and closed by reducing the length of the latch by reducing the mass of the latch.

As another method for solving these problems, a knitting method using a rocking sinker is proposed in JP-B-62-85343.

The rocking sinker uses a lever to move up and down and swing the sinker back and forth. In this way, the speed of the knitting machine is increased by reducing the angle of the raising cam or the stitch cam and reducing the opening / closing speed of the latch of the knitting needle.

[Problems to be Solved by the Invention] When the cam angle becomes steep, an overload is applied to a knitting needle raising cam or a stitch cam that moves up and down at a high speed, and the bat acting on the stitch cam causes wear and breakage of the bat. Make it easier. Further, the speed at which the latch is opened and closed in the loop also increases sharply, causing an accident such as breakage of the latch or wear of the latch in a short time.

The method of using the locking sinker is to lock the sinker in the same longitudinal direction between the knitting needles contained in the cylinder.
Since the sinker must be inserted, the shape and mechanism of the cylinder become complicated, and the knitting needle and locking
There is a disadvantage that it takes a very long time to attach and detach the sinker.

In addition, the use of a locking sinker can be expected to have the effect of loosening the cam angle and reducing the latch opening / closing speed. However, the locking sinker is operated by two types of cams for up, down, front and rear, and further synchronized. It is necessary to perform a rather difficult operation of causing the user to exercise.

In addition, when knitting with open-end yarns, which are used in the knitting industry today and have a high lint generation rate, the load is several times higher than the load applied to conventional sinkers. -The sinker is applied to the sinker, so that a concentrated load is applied to the bat which causes the rocking sinker to move up, down, front and back, which increases the probability of causing bat wear and bat breakage.

A first object of the present invention is to reduce the stress applied to a knitting needle or a sinker in the process of knitting a knitted fabric, thereby making related components usable for a long time and increasing productivity. To provide a knitted fabric knitting method that enables a high operation rate and a high speed.

A second object of the present invention is to provide a circular knitting machine used in this method.

Means for Solving the Problems The present invention relates to a method for producing a knitted fabric in a circular knitting machine using a sinker, wherein a knitting needle catches a yarn at a hook portion as the knitting needle descends during one knitting cycle. Then, when the old loop is cleared and a new loop is formed, the sinker is retracted diagonally outward and upward to position the sinker top above the knitting needle. When the loop is shifted and ascended to a desired safety height, the sinker is moved obliquely inward and downward to position the sinker below the knitting needle.

Preferably, in the sinker, the level of the sinker top always crosses the knitting needle at right angles and moves gradually upward or downward by inward or outward movement.

As the knitting needle, a latch needle or a compound needle known per se can be used.

In the method of the present invention, a jacquard knitted fabric can also be obtained. The patterning method at that time may be any of a pattern wheel, a multi-stage peg holder, a pattern drum, and an electronic patterning method known per se.

Further, the circular knitting machine of the present invention used in the above method includes a cylinder, a sinker rest fixed on the cylinder,
A ring (sinker rest ring) and a sinker dial, a knitting needle accommodated in a needle groove of a cylinder and controlled by a cylinder cam, and a knitting needle accommodated in a radially slidable manner on the sinker rest ring and the sinker dial. A circular knitting machine having a working sinker and a sinker cam for operating or controlling the sinker, wherein the knitting needle knits a yarn supplied via a yarn carrier, and holds the sinker cam for operating or controlling the sinker. The means and the guiding / sliding means of the sinker are substantially formed in an inverted truncated frustoconical shape.

Preferably, the inverted truncated frustum of the holding means of the sinker cam and the guiding / sliding means of the sinker is 5 to 60 degrees,
More preferably from 10 degrees to 45 degrees, particularly preferred is about 20 degrees.
Is to have a degree of inclination angle.

[Operation] According to the present invention, in the process of forming the stitch by the hook portion of the knitting needle capturing the yarn, the sinker top moves upward by retreating the sinker outward. Then, in the process in which the formed stitch moves to the stem of the knitting needle and the knitting needle rises to a desired safety height, the sinker top moves downward by retreating the sinker inward. Therefore, by performing the tilting movement of the sinker, the stitch amount can be secured, and the stroke of the knit cam can be reduced.

Also, at the clearing point, the sinker top can be lowered by moving the sinker inward as in the conventional case. The clearing height of the knit cam can be reduced by the reduced amount of the sinker top.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a longitudinal sectional view showing a main part of a knitting part of the present invention.

On the outer periphery of the cylinder (1), a large number of needle grooves (1a) extending in the axial direction arranged in a circle are formed. Each needle groove (1a) contains a vertically slidable knitting needle. In this embodiment, a latch needle (2) is used as a knitting needle. Each latch needle (2) has an operating bat (2a).

The cam holder (3) facing the cylinder (1) is provided with at least one control cam (4) for operating or controlling the latch needle (2). The cam holder (3) is mounted on a cam ring (5).

A sinker rest ring (6) is attached to the upper end of the cylinder (1) with screws or the like. At the upper end of the sinker rest ring (6), an inward downward slope (6a) is formed,
In addition, many sinker grooves (6
b) is engraved.

A sinker dial (7) fixed to the cylinder (1) is provided outside the sinker rest ring (6), and the sinker dial (7) has a sinker rest ring (6). Similarly, a downwardly inclined portion is formed inward, and a plurality of sinker grooves (7a) are formed in parallel with the downwardly inclined portion at the same inclination as the sinker groove (6b) of the sinker rest ring (6). It is engraved.

Sinker (8) cooperating with latch needle (2) during knitting
Is radially slidable on the sinker rest ring (6) and the sinker dial (7). The sinker (8) is controlled by a sinker cam (10) mounted on the sinker cap (9). The sinker cap (9) is housed in a cap ring (11).

The sinker cap (9) has an inward downward slope formed in the inner diameter portion, like the sinker rest ring (6) and the sinker dial (7).

Sinker rest ring (6), sinker (8), sinker dial (7), sinker cam (10)
The inner diameter of the sinker cap (9) is formed to have a downward inclination angle of about 20 degrees. The tilt angle itself is not a limitation of the present invention, but is currently considered to be preferably between 5 and 60 degrees, more preferably between 10 and 45 degrees.

On the lower side of the cylinder (1) is a drive gear (12) integrally mounted with it, usually when driven by a drive source located on the machine, at the same speed as the cylinder (1). Rotate.

On the cam ring (5) there are supports (13) arranged at equal intervals to fix the cap ring (11).

As shown in FIG. 2, a sinker (8) according to the present invention
The front end of the sword has a horizontal knitting face or sinker top (8a), a lower surface inclined portion (8b) guided by a sinker groove (6a) of a sinker rest ring (6), and a throat (8c). ) And a nose (8d).

The control rear end portion of the sinker (8) is provided with a lower surface inclined portion (8e) guided by the sinker groove (7a) of the sinker dial (7) and a control butt (8f) parallel to the lower surface inclined portion (8e). ing.

FIG. 3 is an operation locus diagram of a cylinder needle and a sinker schematically showing a part of the knitting process according to the present invention in an unfolded manner, and FIGS. 4 to 12 are sectional views taken along lines 4-4 in FIG. It is knitting explanatory drawing which showed 12-12 cross section.

In FIG. 3, the solid line (50) shows the movement locus of the hook tip of the latch needle (2), the dotted line (51) shows the movement locus of the sinker throat (8c), and the two-dot chain line (52) shows the sinker ( 8) shows the movement locus of the vertical movement of 8). (53) is a supply yarn, and these yarns are supplied to the latch needle (2) by the respective yarn carriers (54) provided at each yarn feeder.

Hereinafter, the above-described knitting operation will be described with reference to FIGS. 4 to 12.

First, as shown in FIG. 4 (section 4-4), all the latch needles (2) rise to the highest position (knit). Thereafter, the yarn (53) is supplied by the yarn carrier (54).
At this time, immediately after the sinker (8) has advanced most, the sinker throat (8c) is slightly retracted to the back of the knitting needle.

Then, as shown in FIG. 5 (section 5-5), the thread (53) is supplied to the chest of the latch needle (2) as the latch needle (2) descends. At this time, the sinker (8) retreats outward and diagonally upward.

Subsequently, as shown in FIG. 6 (section 6-6), as the latch needle (2) descends, the needle hook (2b) catches the thread (53). At this time, the sinker (8) continues to retreat diagonally outward and upward. As shown in FIG. 7 (7-7 cross section), the latch needle (2) having captured the thread (53) with the needle hook (2b) is moved from the sinker top (8a) to the thread (5).
The old loop slides up the needle stem while lowering 3), and the latch (2c) is closed. And the needle hook (2
a) The old loop is clearer. At this time, the sinker (8) is at a position which has been moved obliquely upward.

Further, as shown in FIG. 8 (8-8 section), the latch needle (2) is lowered and guided to the lowest position (the lowest point of the stitch),
The thread (53) is further pulled down from the sinker top (8a), and a loop of a required length is suspended. At this time, the sinker (8) is located at the outermost position as in FIG. 7 (7-7 section).

Subsequently, as shown in FIG. 9 (9-9 section), the latch needle (2) keeps maintaining the state of FIG. 8 (8-8 section),
The sinker (8) is at a position where it starts to advance diagonally inward and downward.

Further, as shown in FIG. 10 (10-10 section), the latch needle (2) starts to rise, and the sinker (8) descends while advancing diagonally inward and downward.

Subsequently, as shown in FIG. 11 (section 11-11), the latch needle (2) continues to rise, and the sinker (8) keeps descending while advancing diagonally inward and downward.

Subsequently, the latch needle (2) keeps rising as shown in FIG. 12 (section 12-12). At this time, the sinker (8) advances diagonally inward and downward most and reaches the lowest position, whereby the loop is tightened by the sinker throat (8a) and the size of the loop is determined.

If the latch needle (2) continues to rise further, FIG.
As shown in (4 cross sections), all the latch needles (2) rise to the highest position. Thereafter, the yarn (53) is supplied by the yarn carrier (54), and the knitting operation of one cycle is completed.

The knitted fabric is formed while repeating the knitting operation of one knitting cycle described above.

FIG. 13 is a longitudinal sectional view showing a main part of a knitting part according to a second embodiment of the present invention. Using a compound needle (20) having a main body part (20a) and a slider part (20c) as a knitting needle, changing the control cam (3) to a compound needle, changing the shape of the yarn guiding device, etc. Since there is no substantial change except for the above, the same reference numerals as those in the first embodiment are used for the unchanged portions, and the detailed description thereof will be omitted.

FIG. 14 is a movement locus diagram of a cylinder needle and a sinker schematically showing a part of the knitting process according to the second embodiment in a developed state, and FIGS.
It is a knitting explanatory view showing 15 sections to 21-21 sections.

In FIG. 14, the thick solid line (60) shows the movement trajectory of the tip of the hook (20b) of the body portion (20a) of the composite needle, and the thin solid line (61) shows the movement trajectory of the tip of the slider portion (20c). , The dotted line (62) indicates the motion locus of the sinker throat (8c), and the two-dot chain line (63) indicates the motion locus of the vertical motion of the sinker (8). (53) is a supply yarn, and these yarns are supplied to the composite needle (20) by respective yarn carriers (54) provided at each yarn feeder.

Hereinafter, the above-described knitting operation will be described with reference to FIGS. 15 to 21.

First, as shown in Fig. 15 (section 15-15), the compound needle (20) is at the lowest position (the lowest point of the stitch), and the hook (20b) of the main body is closed by the slider (20c). I have. The stitch forming process has already been completed by the previous cycle, the thread (53) has been pulled down from the sinker top (8a), and a loop of the required length has been suspended. At this time, the sinker (8) is located most outward.

Next, as shown in FIG. 16 (section 16-16), the main body portion (20a) of the composite needle starts to rise, and the sinker (8) descends while advancing diagonally inward and downward.

Subsequently, as shown in FIG. 17 (section 17-17), the main body portion (20a) of the composite needle further continues to rise, but the position of the slider portion (20c) does not change. At this time, the sinker (8) advances diagonally inward and downward to the lowest position, whereby the size of the loop is tightened by the sinker throat (8a).

Subsequently, as shown in FIG. 18 (section 18-18), the body portion (20a) of the composite needle continues to rise, and the slider portion (2
0c) also starts to rise. At this time, immediately after the sinker (8) has advanced the most inward and diagonally downward, it slightly retreats to the back of the sinker throat (8c).

Further, as the composite needle (20) continues to move upward, as shown in FIG.
As shown in section 19), all compound needles (20) rise to the highest position. Thereafter, the yarn (53) is supplied by the yarn carrier (54). At this time, the sinker (8) moves in the lateral direction while maintaining the state of FIG. 18 (section 18-18) as it is.

Thereafter, as shown in FIG. 20 (20-20 cross section), the thread (53) is captured by the needle hook part (2b) as the body part 20a of the composite needle descends, and the slider part (20c) Is raised most and the hook part (20b) is closed. At this time, the sinker (8) rises while retreating obliquely upward.

Furthermore, the body part (20a) and the slider part (2
0c), the old loop is cleared from the hook portion (20b), and as shown in FIG. 21 (section 21-21), the composite needle (20) further descends to the lowest position (stitch end). To the lower point) and the thread (53) from the sinker top (8a)
Is lowered, and the loop of the required length is suspended. At this time, the sinker (8) is located most outward as in FIG. 15 (section 15-15). This completes one cycle of the knitting operation.

The knitted fabric is formed while repeating the knitting operation of one knitting cycle described above.

Although the knitting method using different knitting needles has been described in the second embodiment, the sinker is not limited to the shape shown in FIG. For example, as a third embodiment, the twenty-second
The shape shown in the figure may be used. This sinker (8
0) has a knitting face or sinker top (80a) in the horizontal direction at the front end of the sinker, a lower surface inclined portion (80b) guided by the sinker groove (6a) of the sinker rest ring (6), A throat (80c) and a nose (80d) are provided. The control rear end of the sinker (8) has a lower surface inclined portion (80) guided by the sinker groove (7a) of the sinker dial (7).
e) and a parallel control bat (80f) are provided.

This sinker (80) is the sinker (8) of the above embodiment.
The difference is that the front end lower surface slope (80b) and the rear end slope (8
0e) is a straight line.

The operation method of the sinker (80) is the same as that of the above embodiment.

By performing the method of the present invention, a jacquard knitted fabric can also be obtained. As a patterning method at that time, any of a pattern wheel, a multi-stage peg holder, a pattern drum, and an electronic patterning method known per se may be used. An example of a jacquard knitting machine using a pattern wheel (70) is shown in FIG. 23, and an example of a jacquard knitting machine using a pattern drum (72) is shown in FIG. 24, using an electronic patterning device (73). Examples of jacquard knitting machines are shown in FIG. 25, respectively. Since these patterning devices themselves are widely known in the industry, a detailed description of their structures and functions will be omitted. These jacquard knitting machines differ only in the needle selection means necessary for 3-position patterning, and the relationship between the knitting portion and the sinker is the same as far as the present invention is concerned.

[Effects of the Invention] According to the present invention, when the knitting needle is stitched by tilting the sinker, the sinker is positioned outward as in the related art. At this time, the stroke of the knit cam can be reduced since the stitch amount can be secured by gradually moving the sinker top to the highest position as it moves outward.

Also at the clearing point, the sinker top is lowered by moving the sinker inward as in the conventional case.

The clearing height of the knit cam can be reduced by the reduced amount of the sinker top.

As a result, it is possible to make the angle of the knit cam loose, and it is possible to take measures against abrasion of the needle bat and damage to the bat similarly to the conventional locking sinker.

Further, in the conventional knitting method, if the angle of the stitch portion of the knit cam is made loose, a problem occurs in which the yarn breaks when a weak yarn is used. The same applies to the case, but the sinker top also moves upward at a certain angle as the stitch retracts, so even if the cam angle of the stitch is loosened, the angle at which the sinker top moves upward is added and the total The stitching angle is tight. As a result, the number of needles drawn under the sinker top is reduced, the flow of the yarn is facilitated, and there is no fear of yarn breakage even when a weak yarn is used.

As described above, the circular knitting machine of the present invention has functions equivalent to or more than those of the circular knitting machine having the locking sinker of the prior art.

[Brief description of the drawings]

The accompanying drawings show an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a circular knitting machine showing a main part of a knitting part according to a first embodiment of the present invention. FIG. 2 is an elevational view of the sinker, which is an excerpt of the sinker portion shown in FIG. FIG. 3 is an operation trajectory diagram of a cylinder needle and a sinker schematically showing a part of the knitting process in a developed manner. FIGS. 4 to 12 are knitting explanatory views showing cross sections 4-4 to 12-12 in FIG. FIG. 13 is a longitudinal sectional view showing a main part of a knitting part according to a second embodiment of the present invention. FIG. 14 is an operation locus diagram of a cylinder needle and a sinker schematically showing a part of the knitting process according to the second embodiment of the present invention in a developed manner. FIGS. 15 to 21 show FIG.
It is a knitting explanatory view showing a 15-15 section to a 21-21 section in the figure. FIG. 22 is an elevation view of a sinker according to another embodiment. FIG. 23 is a sectional view of a knitting portion of a jacquard knitting machine using a pattern wheel. FIG. 24 is a sectional view of a knitting portion of a jacquard knitting machine using a pattern drum. FIG. 25 is a sectional view of a knitting portion of a jacquard knitting machine using an electronic patterning device. 2 Latch needle (knitting needle), 2b Hook, 2c Latch 20 Composite needle (knitting needle), 20a Body, 20b Hook 20c Slider 6 Sinker rest・ Ring 7… Sinker dial 7a… Sinker groove (sinker guide / sliding means) 8,80 …… Sinker 8a, 80a …… Sinker top 9 …… Sinker cap (sinker cam holding means) 10 …… Sinker cam 70 …… Pattern wheel 72 …… Pattern drum 73 …… Electronic patterning device

Claims (10)

(57) [Claims] 1. A method for producing a knitted fabric in a circular knitting machine using a sinker (8,80), the method comprising: after one knitting cycle, a knitting needle catching a yarn at a hook portion as it descends, When the loop is cleared and a new loop is formed, the sinker (8,80a) is retracted diagonally outward and upward to position the sinker top (8a, 80a) above the knitting needle. When the loop is transferred to the needle stem and ascends to the desired safety height, the sinker (8,80) is moved diagonally inward and downward to position the sinker (8,80) below the knitting needle. A method for producing a knitted fabric, characterized in that: 2. The sinker (8, 80) wherein the level of the sinker top (8a, 80a) always crosses the knitting needle at a right angle and gradually moves upward or downward by inward or outward movement. The method of claim 1. 3. The method according to claim 1, wherein a latch needle is used as the knitting needle. 4. The method according to claim 1, wherein a compound needle (20) is used as the knitting needle. 5. The method of claim 1 wherein the jacquard fabric is manufactured. 6. The method according to claim 5, wherein patterning is performed by a pattern wheel (70). 7. The method according to claim 5, wherein patterning is performed by a pattern drum (72). 8. The method according to claim 5, wherein the patterning is performed by an electronic patterning device (73). 9. A cylinder (1), a sinker ring (6) and a sinker dial (7) fixed on the cylinder, and controlled by a cylinder cam (4) housed in a needle groove (1a) of the cylinder. A knitting needle (2, 20) and a knitting needle (2, 2) housed slidably in the radial direction on the sinker rest ring (6) and the sinker dial (7).
0) and this sinker (8,8)
A circular knitting machine for knitting a yarn supplied via a yarn carrier, the sinker (8, 80) comprising a sinker cam (10) for operating or controlling the sinker (8, 80). A circular knitting machine characterized in that the holding means (9) of the sinker cam (10) and the guiding / sliding means (7a) of the sinker for operating or controlling the operation of the sinker cam (10) are formed in the shape of an inverted truncated cone. 10. The circular knitting machine according to claim 3, wherein the holding means (9) of the sinker cam (10) and the guiding / sliding means (7a) of the sinker have an inclination angle of 10 to 45 degrees.